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A portable system has been developed for the detection of neutrons. The sensing element is a silicon radiation detector with a Boron-based converter material that detects neutrons with the 10B(n, α)7 Li reaction. The detector response has been simulated with the MCNPX Monte-Carlo software and the detector geometry has been optimized. A portable readout electronics has been built to operate the detector...
Presents a collection of slides covering the following topics: 3D IC multiproject fabrication; high energy physics; circuit bonding; wafer thinning; TSV; radiation detector; CMOS; wafer bonding; and SOI process.
We previously reported Compton imaging measurements of 137Cs and 60Co laboratory sources using the full 15-channel readout of the Gamma-Ray Experimental Telescope Assembly (GRETA). We have since modified the detector geometry to accommodate a wider range of Compton scattering angles and implemented a neural networking method for the location of interaction positions with a 3-cm resolution inside the...
This paper reports on the current status of the development of International Linear Collider vertex detector pixel readout chips based on multi-tier vertically integrated electronics. Initial testing results of the VIP2a prototype are presented. The chip is the second embodiment of the prototype data-pushed readout concept developed at Fermilab. The device was fabricated in the MIT-LL 0.15 μm fully...
The meta-crystals concept is an approach that consists of using both undoped and properly doped heavy crystal fibers of identical material as the active medium of a calorimeter. The undoped fibers behave as Cherenkov radiators while the doped ones behave as scintillators. A dual readout calorimeter can be built with its sensitive volume composed of a mixture of both types of crystals. In addition...
Developments in room temperature cadmium telluride (CdTe) based solid state imaging arrays for energy-resolved single photon counting in x-ray imaging are discussed. We have designed and constructed a CdTe imaging array, 3 mm thick with a 16 × 16 grid of electrical contacts interconnected to a 256 channel ASIC, with a counting range up to 2 × 107 counts per second per mm2. Cycling between high and...
The Polaris system is an array of 18 position-sensitive detectors, using 6 cm3 pixelated CdZnTe crystals from Redlen Technologies and readout electronics from Gamma-Medica Ideas (GMI). Many detectors received from Redlen Technologies are capable of achieving 1% energy resolution or better at 662 keV for all single-pixel events during room temperature operation. Furthermore, 3D position reconstruction...
ICx Radiation, Inc. has implemented a novel timing method for use in a Compton telescope that is capable of nanosecond timing resolution. A critical task in Compton telescope design is to minimize the timing variance between detectors in a large array in order to reduce the background. The voxelSPEC has been developed to combine precise timing with pulse processing electronics in a single device,...
First attempts to use the last version (IV) of the Domino Ring Sampler (DRS) chip for time profile analysis of PMT signals produced in dual-readout calorimeters are described. Time characteristics of the signals sampled with a simple DAQ system based on evaluation boards with the DRS-IV chip are compared with those of equal signals processed with a high performance digital oscilloscope. Separation...
Large Area Picosecond Photo-detector (LAPPD) is a project to develop large area (8"x8") micro-channel plate photomultiplier (MCP PMT) cost effectively. The MCP PMT under development also features a read-out scheme using high frequency (>; 10GS/s) waveform sampling of the signal on Transmission-line. Due to its good timing and space resolution, it would be suitable for Time-of-Flight (TOF)...
We have developed a compact imaging system for GEM detectors, which is applied to thermal neutron imaging. A GEM chamber and a readout board are integrated into one device. The detector is connected to a readout PC with Gigabit Ethernet. This system generates image data of 14.4K pixel from 240 signals employing strip readout method. We have measured performance of the developed system with a pulsed...
We developed a multi-channel digital acquisition (DAQ) system, able to operate in connection to Germanium-based detectors and state-of-the-art charge sensitive preamplifiers. The DAQ system is composed of up to 6 front-end NIM modules, each one with 4 free running analog to digital converters (100 MHz, 14 bits) and up to 6 custom PCI based receiver boards inside a single personal computer (PC). We...
The COCAE project develops an instrument for localization and identification of radioactive sources. For the localization task it will exploit the Compton scattered photons within its detecting layers. It is based on pixilated Cd(Zn)Te matrices in a stacked configuration. Progress has been achieved in all the components necessary for this technology. CdZnTe crystals have been grown of up to 75 mm...
We have developed a prototype Cadmium Telluride pixel detector (SP8-01) to study its performance for high energy X-ray application requirement. The pixel format is 16 × 16 with the pitch of 200 μm × 200 μm. The sensor thickness is 500μm and the readout ASIC contains a charge sensitive amplifier, a shaper, upper and lower discriminators and a 20 bit counter in one cell. The SP8-01 detector achieved...
A telescope for a beam test have been developed. The system is intended to measure the spatial resolution performance of different types of silicon detectors. The telescope has four XY measurement as well as trigger planes (XYT board). It can accommodate up to twelve devices under test (DUT board). The DUT board uses two Beetle ASICs for the readout of chilled DUT, microstrip or pixel silicon detectors...
The ATLAS Tile hadronic calorimeter (TileCal) provides highly-segmented energy measurements of incoming particles. The information from TileCal's last segmentation layer can assist in muon tagging and it is being considered for a future upgrade of the level-one trigger to reject triggers due to radiation background effects in the barrel region. A muon receiver for the TileCal muon signals is being...
Mercuric iodide single crystals have been used successfully as gamma radiation detectors for many years. Recently a different growth method called `seeded homoepitaxy' has been studied. This method has the advantage of growing detector-sized volumes with a thickness of about 10mm in a highly accelerated timeframe. The electronic transport properties of a mercuric iodide detector have been shown to...
The development of radiation detectors for high-resolution high-rate X-ray spectroscopy is strictly related to the continuous improvement of the performances of the related front-end readout electronics. Beside the excellent performances achievable by the integration of the front-end transistor in the detector chip, as successfully obtained in silicon drift detectors with on-chip JFET, many detector...
Stilbene is one of the representative scintillator for the fast neutron detection and also the powerful tools to estimate the neutron-yield evolution with a high temporal resolution against the background of accompanying gamma rays in experiments with non-stationary neutron sources. It demonstrates very high capability of neutron-gamma pulse shape discrimination and could provide high gamma-ray suppression...
In this work, we present a CMOS ASIC design to readout monolithic array of DEPFET detectors with a new readout configuration. As it is known by previous work with this type of detector, silicon Active Pixel Sensor (APS) based on DEPFET device can provide excellent energy resolution together with high frame-rate. For these advantages, DEPFET are now under study for different state-of-the-art instruments...
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